Abstract

MECHAN, Teresa E.; ALEGRE, Julio  and  DOMINGUEZ, Gilberto. Edaphic variability inlfuence on the biomass production of cat'claw Uncaria tormentosa (Willd) D.C. in the Aguaytia watershed, Ucayali, Peru. Ecol. apl. [online]. 2007, vol.6, n.1-2, pp.33-37. ISSN 1726-2216.

Four cat’claw Uncaria tomentosa (Willd) D.C plantations were installed in May 2003 along the Aguaytia river basin in Ucayali, Peru. The plants corresponded to clone 11, in vitro cultured, at the Institute of Biotechnology (IBT) of the Agrarian University (UNALM). The experiment was based on the determination of the edafo-climatic influence on the behavior of this species as a crop. The experimental areas were at different altitude levels that range from 884 to 136 m.a.s.l. First pruning was performed on June 2005 and soil samples were taken from 0 to 15 and from 15 to 30 cm depths. Soil clay content was correlated significantly with the clone´s biomass production and the most representative equations were a) Biomass = 27.329 (% Sand) - 51.875 and b) Biomass = -32.247 (clay) - 2169.8. Most significant indicators of soil fertility in the process of adaptation of this species as crop were the phosphorus (P), organic matter (OM), total nitrogen (N), aluminum saturation (%Al), potassium (K), magnesium (Mg) content and pH.

Keywords : Acid soils; fertility; Uncaria tomentosa (Willd) D.C.; soil variability.

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